JPH10277281A - Sewing machine sewing up belt loop - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly and easily adjust a sewing machine corresponding to the breadthwise change of a belt loop, by feeding a belt loop having a different width so that one end side thereof is arranged at a nearly same preset position and setting the breadthwise expanding or contracting original point at the preset position side of the sewing pattern. SOLUTION: In this sewing machine 1 of a belt loop, a tape M is supplied so as to arrange one breadthwise end side at the same position by a supply device 40 and the sewing pattern of the belt loop is expanded or contracted with the original point of the end of the supply device 40 side by the adjustment of the expanding or contracting structure. Accordingly, when the width of the sewing belt loop has been changed, the expanding or contracting structure is appropriately adjusted in accordance with the change of the width (when it has been changed to a wide or narrow width, the sewing pattern is expanded or contracted respectively). In this way, the tape can be sewed up at a sewing position and a sewing pattern corresponding to the breadthwise change of the tape M and the sewing pattern does not breadthwisely shifted to the tape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt loop sewing machine for sewing a belt loop to a sewing product.

[0002]

2. Description of the Related Art Belt loop sewing machines that sew a belt loop to a sewing product (for example, a waist portion of pants) have been developed with an industrial sewing machine or the like. As shown in FIG. 13, the belt loop sewing machine includes a sewing machine P1 having sewing needles P11, P11 (two at the front side and the back side; see FIG. 1), a cloth presser P13, a lower plate P14, and the like. , Forks P22, P22 for holding a tape piece (belt loop) M between the tips P23, P23
(There are two at the front and the back) and this fork P22,
It generally comprises a supply device P2 having a moving mechanism P24 for moving P22 to a sewing position on the sewing product G, and the like.

According to such a belt loop sewing machine, as shown in FIGS. 14 (a) to 14 (c) ((b) is a side view of (a)), first, a tape piece M is Fork P
After being supplied to the sewing position of the sewing product G while being held at the front end portions P23 and P23 of P22 and P22, the cloth presser P13 descends and presses the sewing product G and the tape piece M, and the forks P22 and P22.
After the tape 22 is retracted and pulled out from the tape piece M, the tape piece M is sewn to the sewing product G by sewing, for example, both sides in the longitudinal direction of the tape piece M with a predetermined sewing pattern h, h. It has become.

In the above-described belt loop sewing machine, generally, a sewing pattern h for sewing the tape piece M is enlarged or reduced in at least the width direction of the tape piece M so as to cope with a change in the width of the tape piece M. A scaling mechanism is provided.

[0005]

Conventionally, a feeding device for a belt loop sewing machine feeds tape pieces M of different widths to feed the tape pieces M to forks P22, P23 and P23, respectively. In this case, the tape pieces M are supplied such that the side ends (side ends on the side of the supply device P2) come to a predetermined position (the position of the line A in FIG. 14A). The enlargement / reduction mechanism of the belt loop sewing machine performs enlargement / reduction with the center of the sewing pattern as the origin (FIG. 14D).

However, in such a method of supplying the tape piece M and a method of enlarging or reducing the sewing pattern, FIG.
As shown in (e), when the tape piece is changed from the narrow tape piece M to the wide tape piece M ', the sewing position of the tape piece M' and the sewing pattern h 'can be changed only by enlarging the sewing pattern. It shifts. This is because the supply device P2 supplies both the narrow tape piece M and the wide tape piece M ′ so that the side ends thereof are at a fixed position, whereas the enlargement / reduction mechanism adjusts the center of the sewing pattern. This is because it is enlarged to the origin.

Therefore, when changing the width of the tape piece M to be sewn, the sewing pattern is enlarged or reduced by the enlargement / reduction mechanism in accordance with the width of the tape piece M. , P26 is loosened and the supply device P2 is moved to change or adjust the interval between the sewing machine P1 and the supply device P2. This adjustment is a complicated operation, and is a heavy burden on the user.

Also, for example, when sewing is performed by a sewing pattern such as a so-called drop-off sewing that protrudes from the belt loop, the fixing screws P26 and P26 of the supply device P2 are also used.
It is necessary to change / adjust the arrangement of the sewing machine P1 and the supply device P2, for example, to move the supply device P2 by loosening, and this is a burden on the user.

Conventionally, enlargement / reduction of a sewing pattern in the width direction is performed by, for example, a mechanical configuration of enlargement / reduction means.
The adjustment is performed by adjusting how much the standard sewing pattern is stretched, and the setting of the length of the sewing pattern is ambiguous. Therefore, it was necessary to repeat trial sewing and the like in order to obtain an appropriate length adjustment.

Further, even when the sewing pattern can be freely set by the electric control, if the sewing pattern such as the number of stitches and the sewing route can be freely set, the number of setting items increases and the setting is troublesome. There was a problem of becoming.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and is capable of quickly and easily responding to a change in the width of a tape piece to be sewn or a change in a sewing pattern such as drop-off sewing. It is intended to provide a sewing machine.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 provides a supply means for supplying a belt loop having an arbitrary width to a sewing position of a sewing product, and a supply means for supplying a belt loop to the sewing position. A belt loop sewing machine having sewing means for sewing the belt loop with a predetermined sewing pattern, and scaling means for scaling the sewing pattern at least in the width direction of the belt loop. The belt loop is supplied such that one end in the width direction of the belt loop is located at a substantially constant set position, and the origin of enlargement / reduction in the width direction by the enlargement / reduction means is set on the set position side of the sewing pattern. Configuration.

According to the first aspect of the present invention, the supply device supplies the belt loop such that one end in the width direction is at a substantially constant set position, and the enlargement / reduction means includes the sewing pattern for belt loop sewing. Is enlarged or reduced with the set position side (for example, the end of the set position side) as the origin. Therefore, when the width of the belt loop to be sewn is changed, only by enlarging or reducing the sewing pattern in accordance with the change in the width. (For example, the sewing pattern is enlarged when the width is changed to a large width, or the sewing pattern is reduced when the width is changed to a small width). Can be sewn. That is, conventionally, when the width of the belt loop was changed, two adjustments of adjusting the enlargement / reduction of the sewing pattern and changing the interval between the supply device and the sewing machine were required. This can be dealt with only by enlarging / reducing the sewing pattern by the enlarging / reducing means. That is,
The sewing machine can be adjusted quickly and easily in response to the change in the width of the belt loop.

Here, the predetermined sewing pattern sewing means includes:
It can be realized by an electric sewing means for performing sewing in a predetermined sewing pattern by electric control, or a mechanical sewing means for performing sewing in a predetermined sewing pattern by a mechanical configuration (for example, a cam or a link mechanism). . The enlargement / reduction of the sewing pattern by the enlargement / reduction means can be performed by changing the control data for determining the sewing position in the case of the electric sewing means, and by the movement by the link mechanism in the case of the mechanical sewing means. It is possible by changing and adjusting the transmission amount of the signal.

According to a second aspect of the present invention, in the belt loop sewing machine according to the first aspect, a sewing start position of the sewing pattern by the sewing means is set to the set position side of the sewing pattern. And

According to the second aspect of the present invention, even if the distance between the set position side and the sewing start position changes due to the enlargement or reduction of the sewing pattern, the set position side and the sewing start position are not changed. Since the positions are almost the same, there is almost no deviation.

According to a third aspect of the present invention, there is provided a supply means for supplying a belt loop having an arbitrary width to a sewing position of a sewing product such that one end side in the width direction of the belt loop is located at a substantially constant set position. A belt loop sewing machine having sewing means for sewing a belt loop supplied to a position in a predetermined sewing pattern; an offset amount inputting means for inputting an offset amount representing an amount of change in a sewing position of the sewing pattern; An offset means for shifting a sewing position of the sewing pattern by the sewing means by the offset amount is provided.

According to the third aspect of the present invention, only by inputting the offset amount by the offset amount input means,
The sewing position of the sewing pattern can be easily shifted.
Therefore, even when sewing is performed with a sewing pattern in which a seam protrudes from a belt loop such as a so-called drop stitch or a narrow sewing pattern in which a seam is formed only in the center portion of the belt loop, it is possible to quickly and easily respond. I can do it.

Here, the method of offsetting by the offset means is to shift the relative position between the sewing product and the sewing machine needle by idle feeding without performing sewing, thereby shifting the needle drop position at the start of sewing. There are various methods such as a method of shifting the relative position of the sewing pattern while performing the sewing to shift the sewing start position of the sewing pattern, a method of shifting the control data of the stitch position of the sewing pattern and sewing the sewing pattern based on the control data.

According to a fourth aspect of the present invention, in the belt loop sewing machine according to the third aspect, the offset means shifts a sewing position of the sewing pattern by idle feeding without performing sewing.

According to the fourth aspect of the present invention, the offset is taken by the idle feed (the sewing position of the sewing pattern is shifted), so that the case where the offset is taken and the case where the offset is not taken are almost the same. Sewing pattern can be sewn. In addition, the method of taking the offset by the idle feed is, for example, only to shift the relative position between the needle and the sewing product before the first stitch is dropped, so that the offset means for performing the idle feed can be realized with a simple configuration, For example, it can be realized as a mechanical configuration.

According to a fifth aspect of the present invention, there is provided a dimension input means for inputting at least one of the sewing lengths and widths of the belt loop sewing, and based on the input one or both of the sewing dimensions. A belt loop sewing machine is provided with a calculating means for calculating and creating a sewing pattern, and a sewing means for sewing a belt loop to a sewing product with the calculated sewing pattern.

According to the fifth aspect of the present invention, the setting and adjustment of the belt loop sewing size can be clearly and easily performed, and fine and cumbersome setting is not required, and the sewing size (length and / or width) is not required. The setting can be performed only by inputting the parentheses.

More specifically, the following methods 1 to 3 can be used as a method for creating a sewing pattern by the arithmetic means. 1. Prepare a standard sewing pattern, calculate the magnification in the length direction and the width direction with respect to the standard sewing pattern based on the input sewing dimensions, and convert the standard sewing pattern in the length direction with the magnification. And a method of creating a sewing pattern having the above-mentioned sewing dimensions by scaling in the width direction. 2. A method in which a minute sewing pattern for sewing a minute range is prepared, and the above minute sewing patterns are connected by the input sewing size to create a sewing pattern of the set sewing size. (3) A method of newly creating a sewing pattern having the sewn dimensions from the input sewn dimensions. The method of creating the sewing pattern by the computing means is described in the above 1-3.
The method is not limited to the above method, but may be any type of method.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

[First Embodiment] FIG. 1 is a perspective view showing the periphery of a sewing portion of a belt loop sewing machine according to a first embodiment of the present invention. FIG. 2 is a top view showing the internal structure of the cloth feed provided in the belt loop sewing machine 1. The belt loop sewing machine 1 according to the first embodiment sewes a belt loop to a sewing product such as a waist of pants, and a sewing machine main body 10 as a sewing means.
And a supply device 40.

The sewing machine body 10 is, for example, a two-needle cycle sewing machine, and includes sewing needles 12 and 12 and cloth pressers 14 and 1.
4 and a receiving plate 16 and the like, and an XY movement mechanism 20 (FIG. 2), a cam 23, a first link 24, a second link 30, a scaling adjustment mechanism 27, and the like are provided inside. The supply device 40 is a feed cutting device 42 that feeds and cuts a predetermined amount of the tape material M serving as the material of the belt loop.
And forks 44, 44 for holding the cut tape material M at the leading end portions 44a, 44a and supplying them to the sewing location, and a moving mechanism (not shown) for moving these forks 44, 44 to the sewing location. ing.

The supply device 40 is provided with tape materials having different widths in the same manner.
a, and when a tape material having a different width is supplied, the side end of the tape material supply device 40 side regardless of the difference in the width is always at the same position. . The work clamps 14, 14 are fixed to the XY moving mechanism 20 (Y table 20Y) via the arms 22, 22, and move with the movement of the XY moving mechanism 20. By moving these cloth pressers 14 in a predetermined pattern during sewing, a predetermined sewing pattern is sewn on a sewing product.

The XY moving mechanism 20 includes a base 20B, X
Table 20X, Y table 20Y, etc.
The table 20X is held movably in the X direction with respect to the base 20B, and the Y table 20Y is held movable in the Y direction with respect to the X table 20X. X
The table 20X moves in the X direction according to the movement of the cam 23, the first link 24, and the second link 30. The Y table 20Y moves in the Y direction according to the movement of a link (not shown).

The cam 23 is provided with a cam groove 23a for determining a sewing pattern, and is adapted to move upward from the bottom in the drawing. The first link 24 swings around a fulcrum 24A, and a roller 25 provided at one end thereof is loosely fitted slidably in the cam groove 23a of the cam 23. As shown in FIG. 3 which is a top view of the initial position of the cam groove 23a and the roller 25, the roller 25 is set to be located at the right end of the cam groove 23a at the start of the belt loop sewing. With this setting, the sewing of the belt loop sewing is started from one end on the supply device 40 side in the sewing pattern.

The second link 30 transmits the swing of the first link 24 to the X table 20X. One end of the second link 30 is rotatable about the rotation shaft 30a.
, And the other end is fixed to the first link 24 so as to be rotatable around the rotation shaft 27a. Rotating shaft 27
The fixed position of “a” can be changed along an adjustment groove 27 b provided in the first link 24.
By changing the fixed position a, the momentum transmitted from the first link 24 to the second link 30 is changed, and the sewing pattern is enlarged or reduced. The transmitted momentum is enlarged or reduced about the central axis O, and the rotation shaft 27 a and the adjustment groove 27 b constitute an enlargement / reduction mechanism 27.

The center line O, which is the center of enlargement / reduction of the enlargement / reduction mechanism 27, is set at one end on the side of the supply device 40 in the sewing pattern of the belt loop. With this setting, when the sewing pattern of the belt loop is enlarged or reduced, the end of the sewing pattern on the supply device 40 side comes to a fixed position.

FIG. 4 is a schematic view showing an example of a sewing pattern obtained by performing sewing using the belt loop sewing machine 1 of this embodiment. The above belt loop sewing machine 1
When sewing is performed by using, sewing such as a sewing pattern h is performed, for example. That is, the supply device 4 for the sewing pattern h
A sewing pattern h having a first stitch I at the end on the 0 side and having a predetermined length in the width direction of the belt loop is formed.

After the sewing pattern is enlarged and adjusted using the enlargement / reduction mechanism 27 and then sewn using the belt loop sewing machine 1, sewing like the sewing pattern h 'is performed. That is, a sewing pattern h ′ having the first stitch I at the end of the sewing pattern h ′ on the supply device 40 side and having an increased length in the width direction of the belt loop is formed. The end of the sewing pattern h 'on the supply device 40 side is formed at the same position as before the enlargement.

As described above, according to the belt loop sewing machine 1 of this embodiment, the supply device 40 supplies the tape piece M such that one end in the width direction is at the same position, while enlarging / reducing. By adjusting the mechanism 27, the sewing pattern for belt loop sewing is scaled up or down with the end on the supply device 40 side as the origin. By appropriately adjusting the reduction mechanism 27 (for example, the sewing pattern is enlarged when the width is changed to a wide width, or the sewing pattern is reduced when the width is changed to a narrow width), the width of the tape piece M is changed. The tape pieces M can be sewn at the corresponding sewing positions and sewing patterns.
It does not shift in the width direction with respect to the tape piece M. That is,
Even when the width of the tape piece M is changed, it is not necessary to adjust the interval between the sewing machine main body 10 and the supply device 40 as in the related art, and it is possible to cope with it only by adjusting the scaling mechanism 27.

In the present invention, the sewing pattern of the belt-loop sewing machine 1 according to this embodiment is not limited to the one shown in the drawing extending from one end to the other end, but goes back and forth between one end and the other end. It is also possible as a sewing pattern. In addition, the detailed structures specifically shown, such as the mechanism for moving the work clamps 14 and the enlargement / reduction mechanism 27, can be appropriately changed without departing from the gist of the invention. Also, an example has been described in which the origin of enlargement / reduction of the sewing pattern is set at the end of the sewing pattern supply device 40 side. However, the origin is not limited to the end of the sewing pattern, and the origin is located inside the sewing pattern from this end. Alternatively, even if the position is shifted outward, the same effect can be obtained as long as it is on the supply device 40 side.

[Second Embodiment] The belt loop sewing machine 100 of this embodiment has the same external configuration as the belt loop sewing machine 1 of the first embodiment, and is shown in FIG. The sewing machine body 1 as a sewing means
The sewing machine body 10 is provided with sewing needles 12 and 12, cloth pressers 14 and 14, a receiving plate 16, and the like. The feeding device 40 has a tape material serving as a belt loop material. A feeding device 42 for feeding a predetermined amount of M and cutting the tape material M;
Forks 44, 44 held by 4a, 44a and supplied to the sewing location, and a moving mechanism (not shown) for moving the forks 44, 44 to the sewing location are provided.

This belt loop sewing machine 100 includes:
Sewing control such as drive control of the sewing needles 12, 12 and movement control of a sewing product by the work clamps 14, 14 is performed electrically. An operation panel 200 (FIG. 6) and a start switch 75 (FIG. 6) are externally provided. , An XY moving mechanism (not shown) and an X motor 7 for driving the XY moving mechanism in the X direction.
1, a Y motor 72 for driving the XY moving mechanism in the Y direction, and a main motor 7 for driving the sewing needles 12
3, a solenoid valve 70 for controlling the vertical movement of the work clamps 14,
A fork advancing end sensor 76 for detecting a state in which the forks 44, 44 of the feeding device 40 are almost fully advanced, a main motor 73
There is provided a main motor position sensor 77 for detecting the rotational position of the sewing machine (the vertical position of the sewing needles 12 and 12 is detected from the detection of the rotational position of the main motor 73), a control circuit 60 for performing sewing control, and the like.

FIG. 5 is a front view of the operation panel 200. The operation panel 200 is used to perform various setting operations related to the sewing pattern.
0, a select key 223, a reset key 221, a loop set key 222, and the like. This operation panel 2
00 constitutes offset input means, sewing size input means, and sewing size input means.

FIG. 6 shows a belt loop sewing machine 10.
FIG. 2 is a block diagram showing a circuit configuration of a zero. Control circuit 60
Is a CPU (Central Processing Unit) 61, ROM
(Read Only Memory) 62, RAM (Random Access Me)
mory) 63 and an I / O interface 64 according to a control program or control data written in the ROM 62.
By controlling the devices connected to the sewing machine 4, drive control of the sewing needles 12, 12, feed control of the sewn material by the cloth pressers 14, and the like are performed. I / O interface 64
Are connected to a solenoid valve 70, an X motor 71, a Y motor 72, a main motor 73, a fork forward end sensor 76, a main motor position sensor 77, a start switch 75, and an operation panel 200.

The control circuit 60 includes an operation panel 200
And outputs various kinds of setting data from the operation panel 200 to calculate and create a sewing pattern based on the setting data. Also, it has a function as an offset means for shifting the sewing pattern.
The setting data input from the operation panel 200 includes, for example, bar-tacking length (sewing length) data indicating the length of the sewing pattern (length in the width direction of the belt loop), and bar-tacking length indicating the width of the sewing pattern. It includes stop width (sewing width) data, offset amount data indicating the amount of deviation of the sewing position of the sewing pattern, stitch number data indicating the number of stitches of the sewing pattern, and the like. These bar tack length data, bar tack width data, and offset amount data can be input as, for example, length data.

The above-described calculation of the sewing pattern is performed, for example, by converting data of a standard sewing pattern written in the ROM 62 into data which is enlarged or reduced in accordance with the above-mentioned bar-tacking length data or bar-tacking width data. It is done by that. The origin of the enlargement / reduction of the belt loop in the width direction is set to be the end of the sewing pattern (the end on the supply device 40 side). Also, how to take an offset (shift of the sewing position) is determined by the end of the sewing pattern (the end on the supply device 40 side).
Is shifted by the length of the offset amount data.

FIG. 7 is a schematic view showing an example of a sewing pattern obtained by performing sewing using the belt loop sewing machine 100 of this embodiment. Belt loop sewing machine 10
When sewing is performed using 0 as the standard setting of the operation panel 200, sewing such as a sewing pattern h1 is performed, for example. That is, the sewing pattern h1 having the first stitch I inside a predetermined amount from the end of the sewing pattern h1 on the supply device 40 side and having a standard length and width is formed.

When sewing is performed by setting the bar-tacking length longer than the standard value in the setting of the operation panel 200, for example, the sewing pattern h
Sewing as in No. 2 is performed. That is, the first pattern I has a first stitch I inside by a predetermined amount from the end of the sewing pattern h2 on the supply device 40 side, and the length of the belt loop in the width direction has a set length, and the standard sewing pattern h1 Same shape sewing pattern h2
Is formed. The end of the sewing pattern h2 on the supply device 40 side is formed at the same position as the end of the standard sewing pattern h1.

FIG. 8 shows an example of various sewing patterns obtained by setting the operation panel 200. Adjust the bar tack length to the width of the tape piece M by setting the operation panel 200.
When sewing is performed with other settings as standard values, a sewing pattern h3 as shown in FIG. 8A is obtained. That is, a sewing pattern h3 having a length corresponding to the width of the tape piece M and a center aligned with the center of the tape piece M is formed.

When the bar-tacking length is set to be longer than the width of the tape piece M and the offset amount is set to the length a and sewing is performed, a drop-off sewing pattern h4 as shown in FIG. can get. That is, the sewing pattern h4 protruding from the tape piece M by the same length on both the left and right sides is formed. Further, if the bar-tacking length is set shorter than the width of the tape piece M and the offset amount is set to the negative length b, and the sewing is performed, the length becomes the center of the tape piece M as shown in FIG. Is obtained.

Similarly, by setting the bar tack width to a value different from the standard value, a sewing pattern in which the width of the sewing pattern (the length of the belt loop in the longitudinal direction) is enlarged or reduced is formed.

FIG. 9 and FIG. 10 are schematic diagrams for explaining how to take an offset (how to shift the sewing position). When an offset is input and offset is set in the operation panel 200, an offset is obtained by sewing feed as shown in FIG. 9 and an offset is obtained by idle feed as shown in FIG. There is. In other words, in the method of taking the offset by the sewing feed shown in FIG. 9, the needle 12 is dropped to the first needle I of the tape piece M to start sewing while the position supplied by the supply device 40 is kept, and the sewing material is moved by the offset amount. Immediately after the sewing, the sewing of the set sewing pattern is started.

In the method of taking the offset by the idle feed shown in FIG. 10, after the tape M is supplied by the supply device 40, the tape 12 is first dropped from the supplied position without dropping the needle 12 to the needle drop position. M is shifted by the offset amount,
The needle drop position of the first stitch is shifted by the offset amount, and thereafter, the sewing of the set sewing pattern is started.

FIGS. 11 and 12 show flowcharts of the sewing control process performed by the control circuit 200. FIG. The sewing control process is started, for example, by turning on the power or turning on a reset switch. When the sewing control process is started, first, in step S1, a search process for the origin (a point at the end of the standard sewing pattern on the supply device 40 side) is performed, and the process proceeds to step S2.

In step S2, various set values are input from the operation panel 200, a sewing pattern is calculated and created based on the input values, and data of the created sewing pattern is displayed on the display unit 210 of the operation panel 200. The data is output and displayed, and the process proceeds to step S3. For example, a standard sewing pattern is prepared, and the magnification and width in the length direction from the standard sewing pattern are calculated based on the input bar-tacking length data and bar-tacking width data. In this method, a standard sewing pattern is scaled up and down in the length direction and the width direction to generate a sewing pattern having the above-mentioned bar-tacking length and bar-tacking width.

In the method of calculating and creating a sewing pattern, for example, a minute sewing pattern for sewing a minute range is prepared, and the minute sewing pattern is input by the input bar-tacking length data and bar-tacking width data. Based on the method of creating a sewing pattern of the set bar-tacking length and bar-tacking width by linking, and the input bar-tacking length data, bar-tacking width data and stitch number data, for example, the sewing cycle time is minimized. Various applications are possible, such as a method of creating a new sewing pattern based on setting data such as a sewing pattern, a stitch pitch, and a sewing speed.

In step S3, the start switch 75
It is determined whether or not has been turned ON. If there is an ON operation, the process proceeds to step S4. If not, the process of step S2 is repeated. In step S4, a signal for moving the forks 44, 44 forward is transmitted to the supply device 40, and the process proceeds to step S5. On the supply device 40 side, the forks 44, 44 are advanced based on this signal, stopped for a short period of time in the most advanced state, and then returned to the original position.

In step S5, it is determined whether or not the forks 44, 44 have moved forward most based on the detection output of the fork forward end sensor 76.
Then, if it is determined that it is not the most forward movement, the determination processing of step S5 is repeated until it is determined that the most forward movement is performed. In step S6, the electromagnetic valve 70 is controlled to
4 and 14 are lowered, and the process proceeds to step S7.

In step S7, it is determined whether the set offset amount data is positive or negative.
At 8, the X motor 71 is driven in the positive direction and a signal is sent to the supply device 40 to retreat the forks 44, 44, so that the forks 44, 44 are retracted. Then, the process proceeds to step S10. If not, a signal for retreating the forks 44, 44 is sent to the supply device 40 side in step S9 to retreat the forks 44, 44, and thereafter, the process proceeds to step S10.

In step S10, it is determined whether or not the forks 44, 44 have retracted from the needle drop position based on the detection output of the fork advance end sensor. If the forks 44, 44 have not retracted, this step S10 is repeated. Step S
Move to 11. In step S11, it is determined whether or not the set offset amount data is a negative value. If the value is not negative, the process directly proceeds to step S13. If the value is negative, the X motor 71 is moved in the negative direction in step S12. It drives and moves to step S13.

In step S13, it is determined whether or not the X table has moved by driving the X motor 71 by the set offset amount. If the X table has not moved, step S13 is repeated, but it is determined that the table has moved. In this case, the driving of the X motor is stopped, and the process proceeds to step S14.

That is, by the processing of steps S7 to S13, the processing of shifting the sewing position by the offset amount by the idle feed is performed. Further, when the set offset amount is a negative value, the X table is moved after the forks 44, 44 are retracted first, so that the work clamps 14, 1 are moved.
4 is prevented from contacting the forks 44, 44.

In step S14, the main motor 73 is driven to start sewing, and the process proceeds to step S15. In step S15, the main motor position sensor 77
It is determined whether or not the position of the needles 12, 12 is at a position higher than the sewing product by a predetermined amount (the height at which the cloth can be fed), and the process of step S15 is repeated until it is determined that the position is at the position. If it is determined that the position is at the above position, the process proceeds to step S16.

In step S16, the XY motors 71 and 72 are driven such that the XY moving mechanism moves by the distance (the sewing pitch) to the next needle drop position based on the sewing pattern calculated in step S2. And step S
Move to 17. In step S17, the value of the stitch number counter of the RAM 63 is incremented by "1", and the routine goes to step S18. In step S18, it is determined whether or not the value of the stitch number counter has reached the set or calculated stitch number data (that is, whether or not the sewing of the sewing pattern calculated and created in step S2 has been completed). If it has reached, the process proceeds to step S19, but if not, the process returns to step S15, and the process from step S15 is repeated again.

When the number of stitches counter has reached the stitch number data and the process proceeds to step S19, the height positions of the hands 12, 12 are set to the height at which the thread can be trimmed based on the detection output of the main motor position sensor 77 in this step. The process of step S19 is repeated until the height reaches a level at which the thread can be trimmed.
When the height reaches a level at which the thread can be cut, the thread cutting operation is sequentially performed to cut the thread (step S20).
0 is performed to raise the work clamps 14 and 14 (step S21), and the processing of one sequence of the sewing control processing ends.

As described above, according to the belt loop sewing machine 100 of this embodiment, the supply device 40 supplies the tape piece M such that one end in the width direction is at a substantially constant position, while the control circuit Since the sewing pattern calculated and created by 60 (enlargement / reduction means) is enlarged / reduced with the end of the sewing pattern supply device 40 side as the origin, even when the width of the tape piece M to be sewn is changed. ,
Just by setting the bar tack length of the sewing pattern to a value corresponding to the width of the tape piece M, the sewing pattern is appropriately enlarged and reduced, and the sewing position and the sewing pattern corresponding to the change in the width of the tape piece M are obtained. The tape piece M can be sewn.

Further, the sewing position of the sewing pattern can be shifted only by inputting the offset amount on the operation panel 200. Therefore, the sewing pattern such as a so-called drop stitch, in which the seam protrudes from the tape piece M, or the center of the tape piece M Even when sewing is performed with a sewing pattern having a narrow seam at the portion, it is possible to respond quickly and easily. In addition, the length and width of the sewing pattern can be set and adjusted clearly and easily by operating the operation panel 200, and fine and cumbersome settings are not required, which is very convenient for the user.

The present invention is not limited to the belt loop sewing machine 100 according to the present embodiment, but includes a configuration of an operation panel 200 for inputting various data, a method of calculating and forming a sewing pattern, and a sewing process. The detailed configuration, method, and the like specifically shown, such as the processing procedure, can be changed without departing from the gist of the invention. In addition, cloth foot 14,
The moving mechanism for moving the X.14 is X
Instead of the Y movement mechanism, an Rθ movement mechanism that moves in the Rθ direction as shown in FIG. 15 may be used. The Rθ moving mechanism is
Specifically, the first swing arm 51 is swung about the shaft 52 by the first drive source 50, and the second swing arm 54 is swung about the shaft 55 by the second drive source 53. The cloth presser 56 is driven in the X-Y direction by the combined force of the swing arms 51 and 54. Further, the stitch at the start of sewing is described as zigzag stitch, but sewing may be started with straight stitches in the longitudinal direction of the sewing pattern. The origin of the enlargement / reduction of the sewing pattern is determined by the sewing pattern supply device 40.
Although the example set at the side end has been described, the origin is not limited to the end of the sewing pattern. good.

[0065]

According to the first aspect of the present invention, the supply device supplies the belt loop such that one end in the width direction is at a substantially constant set position, and the enlargement / reduction means is a sewing device for sewing the belt loop. Since the pattern is enlarged / reduced with the point on the set position side as the origin, when the width of the belt loop to be sewn is changed, the sewing pattern is merely enlarged / reduced in accordance with the change of the width (for example, the width is increased The belt loop can be sewn at the sewing position and the sewing pattern corresponding to the change in the width of the belt loop. That is, conventionally, when the width of the belt loop was changed, two adjustments, that is, adjustment of the enlargement / reduction of the sewing pattern and change of the arrangement of the supply device and the sewing machine were required. This can be dealt with only by scaling the sewing pattern by the scaling means. That is, it is possible to quickly and easily adjust the sewing machine corresponding to the change in the width of the belt loop.

According to the second aspect of the present invention, even if the sewing machine changes the distance between the set position and the sewing start position due to enlargement or reduction of the sewing pattern, the set position and the sewing start position are changed. Are almost the same, so that there is almost no deviation and this is convenient.

According to the third aspect of the present invention, the sewing position of the sewing pattern can be easily shifted only by inputting the offset amount by the offset amount input means. Therefore, even when sewing is performed with a sewing pattern in which a seam protrudes from a belt loop such as a so-called drop stitch or a narrow sewing pattern in which a seam is formed only in the center portion of the belt loop, it is possible to quickly and easily respond. I can do it.

According to the fourth aspect of the present invention, since the method of taking the offset (the method of shifting the sewing position of the sewing pattern) is performed by the idle feed, the operation is substantially the same when the offset is taken and when it is not taken. Sewing to a sewing pattern can be performed. In addition, the method of taking the offset by the idle feed is, for example, only to shift the relative position between the needle and the sewing product before the first stitch is dropped, so that the offset means for performing the idle feed can be realized with a simple configuration, For example, it can be realized as a mechanical configuration.

According to the fifth aspect of the present invention, it is possible to clearly and easily set and adjust the size of the belt loop stitching, and it is not necessary to perform fine and troublesome setting, and the sewing size (length and / or width) is not required. Can be set only by inputting.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a periphery of a sewing portion of a belt loop sewing machine 1 according to a first embodiment of the present invention.

FIG. 2 is a top view showing an internal configuration of a cloth feed provided in the belt loop sewing machine 1;

FIG. 3 is a bottom view showing an initial position of the cam and the rollers of FIG. 2;

FIG. 4 is a schematic diagram for explaining a mode of enlarging or reducing a sewing pattern by the belt loop sewing machine 1 of FIG. 1;

FIG. 5 is a front view showing an operation panel provided in a belt loop sewing machine 100 according to a second embodiment.

FIG. 6 is a block diagram showing a circuit configuration of the belt loop sewing machine 100;

FIG. 7 is a schematic diagram for explaining an aspect of enlargement / reduction of a sewing pattern by the belt loop sewing machine 100;

FIG. 8 is a schematic view showing an example of a sewing pattern obtained by offset sewing and enlargement / reduction functions provided in the belt loop sewing machine 100.

FIG. 9 is a schematic diagram illustrating a mode of offset sewing by sewing feed performed by the belt loop sewing machine 100 in the same manner.

FIG. 10 is a schematic diagram illustrating a mode of offset sewing by idle feeding performed by the belt loop sewing machine 100.

FIG. 11 is a part of a flowchart showing a processing procedure of sewing control performed by the control circuit of FIG. 6;

FIG. 12 is a flowchart of a portion continued from FIG. 11;

FIG. 13 is a side view showing a conventional belt loop sewing machine.

FIG. 14 is a schematic view showing a sewing mode of a conventional belt loop sewing machine.

FIG. 15 is a top view of an Rθ moving mechanism showing another example of the cloth presser moving mechanism according to the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Belt-loop sewing machine (mechanical sewing machine) 10 Sewing machine main body 12, 12 Sewing machine needle 14, 14 Fabric holder 20 XY moving mechanism 27 Enlargement / reduction mechanism 40 Supply device 44, 44 Fork 60 Control circuit 71 X motor 72 Y Motor 100 Belt loop sewing machine (electrically controlled sewing machine) 200 Operation panel

Claims (5)

[Claims] 1. A supply means for supplying a belt loop having an arbitrary width to a sewing position of a sewing product; a sewing means for sewing the belt loop supplied to the sewing position in a predetermined sewing pattern; In a belt loop sewing machine provided with an enlarging / reducing means for enlarging / reducing in the width direction of the belt loop, the supply device moves the belt loops having different widths at a substantially constant set position at one end side in the width direction of the belt loop. The origin of the enlargement / reduction in the width direction by the enlargement / reduction means is set on the set position side of the sewing pattern. 2. The belt loop sewing machine according to claim 1, wherein a sewing start position of the sewing pattern by the sewing means is set on the set position side of the sewing pattern. 3. A supply means for supplying a belt loop of an arbitrary width to a sewing position of a sewing product such that one end side in the width direction of the belt loop is at a substantially constant set position, and a belt supplied to the sewing position. In a belt loop sewing machine having sewing means for sewing a loop in a predetermined sewing pattern, an offset amount input means for inputting an offset amount representing a change amount of a sewing position of the sewing pattern; and the sewing pattern by the sewing means. An offset means for shifting the sewing position of the belt loop by the offset amount. 4. The sewing machine according to claim 3, wherein the offset means shifts a sewing position of the sewing pattern by an idle feed without performing sewing. 5. A dimension input means for inputting at least one of a sewing length and a width of a belt loop sewing, and a sewing pattern is calculated based on one or both of the input sewing dimensions. A belt loop sewing machine comprising: a calculating means; and a sewing means for sewing a belt loop to a sewing product with the sewing pattern created by the calculation.